Before Jerusalem, a 24-year-old Jez Butterworth electrified British theatre with a swaggering story of pill-popping Soho gangsters. Nearly two decades on, he tells Ryan Gilbey why it's time to put it back on the jukebox

Henry Barnes: Now that the final DVD has been released, we look back through our diary at six months of Pottermania and talk to three of the franchise's stars – David Thewlis, Michael Gambon and Jason Isaacs